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Lignite wax oxidizing and refining method

A technology of oxidation refining and montan wax, which is applied in the recovery/refining of mineral wax, petroleum industry, etc., can solve the problems of destroying the chromophoric group or structure of montan wax, adding ammonia water to stimulate the smell, and the product cannot be completely decolorized, etc., to achieve Excellent wax quality, short reaction time and high yield

Active Publication Date: 2014-01-22
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are only one domestic article and one patent on the chromium-free oxidative refining of montan wax, Li Baocai et al. Tried to oxidize and refine montan wax with nitric acid. As a result, the product could not be completely decolorized, and it was easy to cause environmental pollution, so it failed to realize industrialization.
Although the application number 201010535750.0 has also announced a kind of oxidative decolorization refining method of chrome-free montan wax, it still has great limitations: it adopts the mixture of hydrogen peroxide and ammonia water as the main bleaching agent, but after repeated verification, it is found that this Method During the experiment, there will be obvious saponification reaction, and the montan wax will become foamy and expand. If the solvent is added too quickly, it will cause violent splashing. It is misleading, because the wax after saponification is indeed milky white, but the final color is still darker at temperatures above the melting point of montan wax (about 80°C), which shows that this method cannot effectively destroy the interior of montan wax Chromophores or structures
At present, there is no report on the combined bleaching of peracetic acid and hydrogen peroxide in the oxidation and refining of montan wax

Method used

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  • Lignite wax oxidizing and refining method
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  • Lignite wax oxidizing and refining method

Examples

Experimental program
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Effect test

Embodiment 1

[0018] 1. First add 1kg of defatted montan wax to the reaction kettle, then mix and dissolve 200g of peracetic acid solution with a mass percentage concentration of 15% and 5g of sodium silicate, then adjust the pH value to 4 with NaOH, at 90°C every 0.5 hours Add to the reaction kettle, each adding amount is one-third of the total amount, stir and react for 1.5 hours, during which the previous part of the bleaching residue is separated before the new mixture is added, and finally the initial bleaching wax is obtained;

[0019] 2. Put the wax in the initial bleaching section into the reactor, then mix and dissolve 200g of hydrogen peroxide solution with a mass percentage concentration of 25% and 5g of ZJ-CH01 oxygen bleaching stabilizer, adjust the pH value to 8 with NaOH, and set the temperature at 90°C Add to the reactor every 0.5 hours, each addition is one-third of the total amount, stir and react for 1.5 hours, during which the previous part of the bleaching residue is sep...

Embodiment 2

[0023] 1. First add 20kg of defatted montan wax to the reactor, then mix and dissolve 6kg of peracetic acid solution with a mass percentage concentration of 20% and 400g of water-soluble chitosan, and then adjust the pH value to 6 with NaOH. Add to the reactor in 0.4 hours, each adding amount is one-fifth of the total amount, stir and react for 2 hours, during which the previous part of the bleaching residue is separated before adding the mixed solution, and finally the initial bleaching wax is obtained;

[0024] 2. Put the wax in the initial bleaching section into the reactor, then mix and dissolve 6kg of hydrogen peroxide solution with a mass percentage concentration of 30% and 400g of self-made BC-YC01 oxygen bleaching stabilizer, adjust the pH value to 10 with NaOH, and Add to the reaction kettle every 0.4 hours, each addition is one-fifth of the total amount, stir and react at 95°C for 2 hours, during which the previous part of the bleaching residue is separated before the...

Embodiment 3

[0029]1. First add 10kg of degreased montan wax to the reaction kettle, then mix and dissolve 2.5kg of peracetic acid solution with a concentration of 18% by mass and 100g of disodium ethylenediaminetetraacetic acid, then use NaOH to adjust the pH value to 5, and set the temperature at 100°C Next, add the reaction kettle every 0.4 hours, each addition is 1 / 4 of the total amount, stir and react for 1 hour, during which the previous part of the bleaching residue is separated before the new mixture is added, and finally the initial bleaching section wax is obtained;

[0030] 2. Put the wax in the initial bleaching section into the reactor, then mix and dissolve 2.5kg of hydrogen peroxide solution with a mass percentage concentration of 28% and 100g of self-made BC-YC01 oxygen bleaching stabilizer, adjust the pH value to 9 with NaOH, and Add to the reaction kettle every 0.4 hours, each addition is 1 / 4 of the total amount, stir and react at 100°C for 1 hour, during which the previou...

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Abstract

The invention discloses a lignite wax oxidizing and refining method which comprises the following steps: on the basis of taking degreased lignite wax as a raw material, refining the lignite wax by using a sectional method, firstly, performing primary rinsing by using peracetic acid and assistant, subsequently performing secondary rinsing by using hydrogen peroxide and hydrogen peroxide assistant, and finally drying and preparing a refined lignite wax product in a hot melting mode. The method disclosed by the invention is simple, feasible in technique, environment-friendly and energy-saving, the prepared wax is excellent in quality, and the method is an effective method for oxidizing and refining lignite wax of a non-chromium system.

Description

technical field [0001] The invention relates to an oxidation refining method, in particular to an environment-friendly oxidation refining method of montan wax. Background technique [0002] Montan wax is a waxy product extracted from lignite with organic solvents under certain conditions. It is widely used in daily chemical, foundry, automobile and other fields because of its irreplaceable excellent characteristics. However, due to the aromatized tricyclic diterpene and pentacyclic triterpene hydrocarbons and other substances in the crude lignite wax, it is dark brown, even after degreasing, the lignite wax is still darker in color, which greatly affects its application range. Therefore, how to remove the oxidative refining of dark substances in montan wax has become the focus of research in the field of montan wax. At present, the more mature and effective decolorization methods are still chromic anhydride, chromic acid and dichromate oxidation, but there are many defects ...

Claims

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Application Information

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IPC IPC(8): C10G73/00
Inventor 李宝才袁承韦曦秦谊张惠芬
Owner KUNMING UNIV OF SCI & TECH
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